/*
 * To change this template, choose Tools | Templates
 * and open the template in the editor.
 */
package servletcourse;

import java.io.IOException;
import java.io.PrintWriter;
import java.util.List;
import javax.ejb.EJB;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import sessionbean.CourseFacadeLocal;
import supportlearning.entities.Course;

/**
 *
 * @author Khin
 */
public class manageCourse extends HttpServlet {

    @EJB
    private CourseFacadeLocal courseFacade;

    /** 
     * Processes requests for both HTTP <code>GET</code> and <code>POST</code> methods.
     * @param request servlet request
     * @param response servlet response
     * @throws ServletException if a servlet-specific error occurs
     * @throws IOException if an I/O error occurs
     */
    protected void processRequest(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {
        response.setContentType("text/html;charset=UTF-8");
        PrintWriter out = response.getWriter();
        try {
            String action = request.getParameter("action");
            if (action == null) {
                List<Course> list = courseFacade.findAll();
                request.setAttribute("listcourse", list);
                request.getRequestDispatcher("manageCourse.jsp").forward(request, response);
            } else if (action.equals("Edit")) {
                int id = Integer.parseInt(request.getParameter("id"));
                Course course = courseFacade.find(id);
                request.setAttribute("course", course);
                request.getRequestDispatcher("updateCourse.jsp").forward(request, response);
            } else if (action.equals("Update")) {
                String courseid = request.getParameter("courseid");
                String coursename = request.getParameter("txtcoursename");
                String des = request.getParameter("descourse");
                String duration = request.getParameter("txtduration");
                Course course = courseFacade.find(Integer.parseInt(courseid));
                course.setCourseName(coursename);
                course.setDescription(des);
                course.setDuration(duration);
                courseFacade.edit(course);
                response.sendRedirect("updatecoursesuccessfull.jsp");
            }
        } finally {
            out.close();
        }
    }

    // <editor-fold defaultstate="collapsed" desc="HttpServlet methods. Click on the + sign on the left to edit the code.">
    /** 
     * Handles the HTTP <code>GET</code> method.
     * @param request servlet request
     * @param response servlet response
     * @throws ServletException if a servlet-specific error occurs
     * @throws IOException if an I/O error occurs
     */
    @Override
    protected void doGet(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {
        processRequest(request, response);
    }

    /** 
     * Handles the HTTP <code>POST</code> method.
     * @param request servlet request
     * @param response servlet response
     * @throws ServletException if a servlet-specific error occurs
     * @throws IOException if an I/O error occurs
     */
    @Override
    protected void doPost(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {
        processRequest(request, response);
    }

    /** 
     * Returns a short description of the servlet.
     * @return a String containing servlet description
     */
    @Override
    public String getServletInfo() {
        return "Short description";
    }// </editor-fold>
}
